Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3697d23e63b938…

MALICIOUS

PDF

81.7 KB Created: 2021-02-24 22:35:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4654e1f137c845b8734989540775ae0e SHA-1: 29d4bb332417f23d03ba4d2ec7674acdd4950318 SHA-256: ee3697d23e63b9389625fe6da78db481e8806231957567db805270ccc75590bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to movie searches, aligning with a lure to entice clicks on the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/strik?utm_term=kung+fu+hustle+movie+online+free+english PDF link annotation
    • http://jaxagogilexet.sportsontheweb.net/listening_comprehension_activities_for_6th_grade.pdfIn PDF document text
    • https://bozaxadoduzake.weebly.com/uploads/1/3/4/3/134306622/lozikusufutex.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/proform_6.0_rt_2.0_hp_motorized_treadmill_reviews.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/past_perfect_present_perfect_exercises_with_answers.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/984016200.pdfIn PDF document text
    • http://baxijemapuzoxu.22web.org/latituviborodeluzirakis.pdfIn PDF document text
    • http://fukanaduvubife.22web.org/lovudukuxod.pdfIn PDF document text
    • https://firudofomupavu.weebly.com/uploads/1/3/1/3/131384713/tusum_rudos_wifez.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/97875373608.pdfIn PDF document text
    • https://zokokemakate.weebly.com/uploads/1/3/1/4/131454090/ec308378724db43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovarede.rf.gd/vozibazabojipu.pdfIn PDF document text
    • http://netupizorazez.rf.gd/nenu_local_arere_yekkada_female_song.pdfIn PDF document text
    • http://vakakumiwizexoj.epizy.com/38426451645.pdfIn PDF document text
    • http://titasukutisun.epizy.com/martyrs_movie_link.pdfIn PDF document text
    • http://pugapugene.rf.gd/21692676215.pdfIn PDF document text
    • http://pubupamosala.epizy.com/plastic_deformation_ppt_slideshare.pdfIn PDF document text
    • http://fuxivupinamipi.rf.gd/83851046815.pdfIn PDF document text
    • http://pulilidason.epizy.com/roasted_red_peppers_nutrition_information.pdfIn PDF document text
    • http://pevoxetawalob.rf.gd/pilexuditonusuwuramevit.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/gorekopuxefenofi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AA 3896 bytes
SHA-256: 657a7745a4d51a435e091d516115cc526d9865d7cf8384143fe657f60d0346cf
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 5000 bytes
SHA-256: f06ca19d6fd4f4607585006413ad80604cdf47dc016041f2d2eae44817c4a331
font_02_sfnt_off0001116f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116F 11096 bytes
SHA-256: b4c31d1ce5390c31e26af4502a5e5d5b937ddd1a15036f51cc3ce8286c509c84

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